Had this annoying P0442 code on my GMC Sierra—means something’s up with the EVAP system, y’know? First thing I tried was checking the gas cap. Turns out it was real loose, and fixing that cleared the code. Who knew, right?
Next was draining the charcoal canister. Listening to car forums, they raved about cleaning it. I didn’t have the kit, so just drained it and blew some compressed air in there. Didn’t solve it, but ran smoother for a bit. And sometimes that’s enough to buy time before the real fix.
And of course, who can forget the vacuum lines? Found this cracked line under the hood. Replaced it and the code vanished. Thought it might be the purge valve too, but didn’t bother changing it yet. Does this happen to ya too? What you use to clear this code? And what keeps you up at night? Weird how these cars work sometimes, huh?
So, I had this annoying P0442 code on my 2011 GMC Sierra upstate New York. Thought the evaporator was toast. Turned out it was just a dirty MAF sensor. Gave it a good clean, and bam, all good! Talked to a buddy in Toronto who had the same problem, ended up being suction hose issues. Just keep those lines tight, folks!
I’ve been dealing with the P0442 on my '17 GMC Sierra right here in Toronto. After a bit of digging online, I found out a clogged O2 sensor or a vacuum leak’s usually the culprit. So I replaced the oxygen sensor myself—pretty straightforward! Has saved me a bunch of cash on dealership prices. Another buddy said his Carma place found a faulty evap canister instead. So ya never know, but start with the sensor and see if that does the trick. Good luck!
I’ve got this P0442 code on my GMC Sierra in Toronto, and it was driving me nuts. Tried cleaning the evap canister, cuz I heard that helps a lot. My buddy, also in Canada, replaced his purge valve, and it worked! Cuz it’s a common fix. Honestly, just tackling one part at a time solved the issue for me, no massive repair needed.
I’ve had a P0442 code on my GMC Sierra in Texas. Usually, a loose gas cap or clogged catalytic converter does the trick. Always start with the basics, y’know? Those fixes save a bunch! 
Never know 'till ya try it!
I remember when my buddy in Alberta got the dreaded P0442 error on his GMC Sierra. We figured it out real quick – a nasty gas cap. Tried replacing the EGR valve too, but turns out just a loose cap was the culprit. Learned to check the small stuff first before diving into costly repairs, saves heaps! Everyone’s different, but that’s the tip I live by!
In Toronto, I’ve dealt with this P0442 code on my '16 Sierra—decided the evaporative system purge valve was bunk. Swapped it and it’s smooth now, no gas leak vibes! It’s common to find clogged hoses too, so always check! Good luck, folks!
I’ve got a buddy in Ontario who constantly dealt with the P0442 error on his GMC Sierra. Swapping the evaporative canister purge Valve did the trick! Despite a few hiccups along the way, he’s been cruising smooth ever since and cracking jokes about his “sensor dancing.” 
I’ve got a buddy in Canada, totally loving his GMC Sierra but hit a P0442 error. Just did a simple O2 sensor swap and the thing’s purring. Some swear by cleaning the evaporative system, while he’s saying it’s mostly sensor. Family said, “Worth it!” for avoiding a hefty mechanic bill. It’s all DIY these days, am I right? 
Savings!
In Toronto, I’ve seen this P0442 error on a buddy’s GMC Sierra a few times. Usually, it’s the EGR valve acting up or maybe the O2 sensors. Once, I had the same problem and just replaced the O2 sensor on the bank 1 side, bam—fixed! Also, didn’t hurt checking hose clamps and connectors for leaks. Seems like there’s always a fixable issue, no need for a pricy shop visit.initely keep some basic tools on hand, you know?
I once had a P0442 on my GMC Sierra while living out in Nebraska. Ran into this pesky code when set out for a cross-country trip. Tried cleaning the evaporator leak or replacing the purge valve first—both easy fixes. Cost-effective solutions, but remember to not overlook a proper diagnostic to avoid unnecessary repairs. You don’t wanna waste time or cash on that!